William mavee



KNO Model.) 2 sheets-sheen 1. W. MAVER, Jr.

BRANGH CIRCUIT FOR QUADRUPLEX TELEGRAPHS.

N0. 340,137. Patented Apr. 0, 1886.

l glib (No Model.) I 2 Sheets-Sheet 2..

W. MAVER, Jr.

BRANGH CIRCUIT FOR QUADBUPLEX TELBGRAPHS. No. 340,137. Patented lpr. 20, 1886.--

l wbw/boz William .Mayer :L @5.1, www @am @m @www4/ NITEE STATES ATENT EEICE. i

WILLIAM MAvEE, JE., OE JERSEY OITY, NEW IJEEsEY, AssIGNOE TO THE BALTIMORE AND OHIO TELEGEAPH COMPANY, OE BALTIMORE, MD.

BRANCH ClRCUIT FOR QUADRUPLEX-TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 340,137. dated Apr120, 1886.

Application liled October 9, 1885. Serial No. 179,419. (No model.) I

To all whom, it may concern:

Be it known that I, WILLIAM MAvEE, Jr., a citizen of the United States, residing in .I ersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in System of Circuits for Quadruplex Telegraphs, of which the following is a specilication.

In operating a quadrupleX-telegraph system IO it sometimes Occurs that itis desirable to lease one set of instruments, or, as it is termed, one side;7 of the system to outside parties-for instance, to a broker. It is desirable that such party shall have full control of that side of the system and be able to operate as though it were a separate single wire. It has been customary to so organize the apparatus that the lessee may receive the messages which are being sent from the central ofiice, and, under zo certain circumstances, transmit back to the central office.

The object of my invention is to provide a system wherein the lessee may receive the messages which are being transmitted to or 2 5 from any ofthe other stations connected with the corresponding side of the quadruplex system, and also break in and transmit to all of such stations with equal facility.

In carrying out the invention the apparatus,

3c is organized substantially as follows: For convenience,it may be considered that at one station of a quadruplex system there is located apparatus for transmitting to and receiving from three different distant stations. It is desired then to include in the system the office of a broker located in the neighborhood ofthe home station, and to give to him the control ot' one side-say the polar sideof the system whenever desired. The continuity-preserv- 40 ing transmitter is included in. the local circuit controlled by the polar relay of each set of instruments, and a conductor leads from the transmitting-point of one of these transmitters to the lever ofthe second, and likewisea conductor leads from the transmitting-point of the second to the lever of the third transmitter. Suitable switches are provided whereby the transmitters and these conductors may be made to constitute one continuous circuit. 5o The circuits are further so organized that when the transmitters are in one position the circuit will be completed from the earth through the entire system of continuity-preserving transmitters and back to earth. At some suitable point in the circuit thus made there islocated a battery, and the conductor leading from one of the transmitters to a succeeding one is eX- tended to form a loop including the lessees oiice. lAt this office there is placed a receivare transmitted upon the polar side from any of the distant points connected with the system will be sent through the loop-conductor by the corresponding transmitter, andrwill be recorded by the lessees receiving-instrument. .The lessee may at any time breakin, however,

lby simply operating his key to break the connections ofthe 1oop. By making and breaking the connect-ions of the loop-circuit the several transmitters controlling the outgoing 7o lines from the central station may be operated, and thus the lessee is enabled to transmit to all the distant stations.

In the accompanying drawings, Figures l and 2 are diagramsillustrating the general or- 75 ganization of the apparatus.

Referring to these diagrams, L', L2, and L3 represent a series of telegraph main lines of a quadruplex system, leading from a central station to as many distant points. rIhese lines 8o are respectively provided with pole-changing transmitters P', P, and P3, adapted to trans mit currents of either polarity from corresponding batteries,O, O2, and O3. Each polechanger is provided with a corresponding actuating-magnet, p, p2, and p3, included in the circuits of corresponding local batteries, o', o2, and o3. A key, lc, is also vincluded in.v each of these circuits, by means of which the pole-changer is operated. In each main line there is included a polar relay, as shown at R, R2, and R3, respectively. Theseare rendered responsive to incoming but silent to outgoing currents in any suitable manner. The lines are further equipped with neutral relays and '95 corresponding transmitters; but these are not here represented, as it is necessary only to show the polar side of the system.

For the purpose of operating all the polechangers together when it is desired, a series-ico ing-instrumentandakey. Whatevermessages 6o of transmitters, T', T, and T?, and three-point switches, A', A2, and A, are employed. The latter are respectively included in the eircnits of the local batteries o' o'l o3. When in the positions shown in Fig. 1 upon their respective points a', a2, and a3, these switches close their respective local circuits through their respective electro magnets p p2 p. Each switch is provided with a second point, b', b2, andl b3, respectively. The point b' is connected by a conductor, 2, with the contactspring tof the transmitter T'. The lever of this transmitter is connected by a conductor, 3, with the point a'. A conductor, l, connects one pole of the battery o with the earth at G. A conductor, Z, leads from the contact-point s' of the transmitter T to the pole of the battery o", corresponding to that of the battery o',whicl1 is connected with the earth. A corresponding system ot' circuit -connections is made with respect to the transmitters T2 and T3, the contact-point of the last transmitter being connected with the earth at G2. The transmitters T', T2, and T3 are designed. to be made to respond to incoming currents by the operations of the corresponding polar relays, R', R", and R3,which serve to make and break the connections of corresponding local batteries, o', o, and o6, through corresponding magnets,q. Theconnections aresuch thatwhen no messages are being sent in upon the lines L', L", and L, the transmitters T', T", and T3 will remain at rest in the positions shown in the drawings, completing the circuit-connections from the earth at G' to the earth at G, provided only the several switches A', A, and are upon their respective contact-points b', b", and b3, as shown in Fig. 2.

It is designed that the conductor l, connecting one of the transmitter-points with t-he local circuit ofthe succeeding pole-changer, shall be extended to the branch or lessees office, which is to be included in the system, as represented. There is provided at such office a key, C, and a sounder or other receiving-instrument, D. A battery, O, is also included in this conductor, or at some point in the circuit, and the entire system of batteries are connected in series. Vthen the circuit is closed, the several magnets p', p2, and p3, and that of thesounderD,areallvitalized. Byinterrupting the circuit at any point they will all become demagnetized. By operating any one of the keys la', It', or 7c3 it is apparent that all the pole-changers will be actuated and the message transmitted automatically upon the several lines L', L2, and L, and also through the instrument D at the branch or substation.

and L, will produce a similar effect, so that incoming messages from any line will be transmitted through the station upon the other two lines, and will also operate the receivinginstrument D. This instrument may be constructed as a sounder or a relay, or in any other suitable manner to serve the purposes of a receiving-instrument, and it is evident that it, together with the key C, constitutes a complete station apparatus for receiving and for transmitting in both directions. lt should be here noticed that when messages are being received from any line-L', for instance-the pole-changer corresponding thereto will not be actuated, for the reason that when the transmitter T is in the position shown in the drawings the circuit of the several batteries is complete through the magnet p', and when the transmitter is in the reverse position the circuit of the battery o' is complete through the conductor 2, spring t, lever s, and conductor 3, and therefore the magnet will remain vitalized by reason of the current from this local battery.

I claim as my invention- 1. The combination, substantially as hereinbefore set forth, with a series of quadruplextelegraph main lines andthe set of instruments pertaining to one side of the same, of a loopconductor connecting two or more of said sets of instruments, which conductor extends through a branch office and transmitting and receiving apparatus included therein.

2. The combination, substantially as hereinbefore set forth, of a series of quadruplex-telegraph main lines converging to a single station, a branch otice, a loop-conductor extending from said station to include said oiiice, and means for transmitting upon all of said lines and through said loop-conductor simultaneousl y.

3. The combination, substantially as hereinbefore set forth, of a series of main lines, transmitting and receiving devices applied to each of the same, means for transmitting upon all of said lines simultaneously, a branch oice or station, telegraphic instruments located at said oftee,a circuit including said instruments, and means for controlling the connections of said circuit operated by any of the said transmitting or receiving devices, substantially as described.

4. The combination, substantially as hereinbefore set forth, in a quadruplex system, of

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means for transmitting upon radiating lines of said system either independently or together, a branch station, and a conductor extending from one of said line-transmitters through said station to a second ot saidline-transmitters, substantially as described.

5. The combination, substantially as hereinbefore set forth, of two or more transmitters, electro-magnets, and local circuits forl operating the same, two or more receiving-instruments, local circuits having their connections controlled thereby, transmitting devices operated by currents in the last-named local circuits, means for connecting one of the firstnamed local circuits through one of saidtransniitting devices with asecond ofthe firstnamed before set forth, of a series of quadruplextele graph main lines converging to a single station, a loop conductor connecting the Various quadruplex sets in said single station, and means for transmitting upon all of said lines and through said loop-conductor simultaneously.

In testimony whereof I have hereunto subscribed my name this 8th day of October, A. D. 1885.

WILLIAM MAVER, JR.

Witnesses:

DANI.. W. EDGECOMB, CHARLES A. TERRY. 

